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In this article, you will find the study notes on Three Phase transformer which will cover the topics such as Connection of 3-Phase Transformer. Three Phase Transformer Three phase transformers are used throughout…

The time interval that must be allowed between the operation of two adjacent relays in order to achieve correct discrimination between them is called the grading margin. If a grading…

What are they? Figure 1 A printed circuit is a conductive pattern glued to one or both sides of an insulating material. Holes are punched or drilled through the conductor…

The protection provided by the protective relaying equipment can be categorized into 2 types as: Primary protection Backup protection Primary Protection: The main protection or primary protection is the first…

What do they do? The electronic component known as the inductor is best described as electrical momentum. In our water pipe analogy, the inductor would be equivalent to a very…

All matter is composed of molecules which are made up of a combination of atoms. Atoms have a nucleus with electrons orbiting around it. The nucleus is composed of protons…

Digital Multimeter is a device which has two words in its name: Digital and Multimeter. Let’s first try to analyze why do we have them there i.e. what do each…

The main supporting unit of overhead transmission line is transmission tower. Transmission towers have to carry the heavy transmission conductor at a sufficient safe height from ground. In addition to…

Basically there are three types of measuring instruments and they are Electrical measuring instruments Mechanical measuring instruments. Electronic measuring instruments. Here we are interested in electrical measuring instruments so we…